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Identification and characterisation of individual nanoplastics by scanning transmission X-ray microscopy (STXM)
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Researchers tested scanning transmission X-ray microscopy combined with near-edge X-ray absorption spectroscopy as a method to detect and identify individual nanoplastics in environmental and food samples. They successfully characterized nanoplastics from eight common polymer types and confirmed the presence of diverse nanoplastics in unspiked soil samples and tea water from plastic teabags. The technique offers a promising new analytical approach for nanoplastic detection in complex matrices.
Nanoplastics (NP) are of environmental and human health concern. We tested a novel NP extraction method and scanning transmission X-ray spectro-microscopy (STXM) in combination with near-edge X-ray absorption fine-structure spectroscopy (NEXAFS) to image and identify individual NP in environmental and food matrices. We (1) discussed the potential of STXM compared to other methods potentially suitable for NP analysis, (2) applied the method on NP suspensions of eight of the most common polymers, (3) analyzed environmental water and soil samples spiked with NP and (4) characterized NP in tea water infused in plastic teabags and unspiked soil samples. Here we show that STXM has methodological advantages and that polymers give characteristic spectra, which allows NP identification in environmental and food matrices. For soils we deliver a visual and spectroscopic characterization of NP, proving their presence and highlighting their diversity. Thus, STXM, can be used for the detection and characterisation of NP in different types of matrices.
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Identification and characterisation of nanoplastics by scanning transmission X-ray spectro-microscopy (STXM) - Spectral data
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This study developed and applied scanning transmission X-ray microscopy to identify and characterise nanoplastics in environmental samples. Researchers found the technique can distinguish nanoplastic particles from other organic materials and provides chemical detail not available from optical methods alone.
Identification and characterisation of nanoplastics by scanning transmission X-ray spectro-microscopy (STXM) - Spectral data
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This appears to be a companion or duplicate record to a study on nanoplastic characterisation using scanning transmission X-ray microscopy. The paper presents methods and findings on identifying nanoplastics at the sub-micron scale in environmental matrices.
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Researchers developed a correlative approach combining scanning electron microscopy and Raman microscopy to detect and identify nanoplastics as small as 100 nanometers in complex environmental samples. The method was tested on various matrices and successfully identified individual plastic nanoparticles that would be missed by conventional techniques. The study represents a significant advance in analytical capability for studying the smallest and most challenging size fraction of plastic pollution.
Micro- and Nanoplastic Analysis in Soils
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This methods paper describes analytical approaches for detecting and characterizing micro- and nanoplastic particles in soil samples using chemical separation, FTIR microscopy, and X-ray spectroscopy. Reliable soil microplastic analysis methods are urgently needed given that agricultural soils are a major but understudied reservoir for plastic contamination.
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